Adding one-off extra firings to a Quartz CronTrigger

Question

I was wondering how I might take a CronTrigger and add an extra one-off firing such that I can iterate over the firing times as I might with the getFileTimeAfter(Date) method

Say if I had a CronTrigger expressed by: "0 0 12 * * ?"

How might I add one additional firing as might be expressed by a SimpleTrigger with no repeat?

Answer 1

This isn't possible with CronTrigger itself. You can, however, associate as many different Triggers with a given JobDetail as you like.

You could simulate what you're trying to achieve by registering your CronTrigger plus a SimpleTrigger, call getFireTimeAfter on each trigger, and take the earlier value.

Annoyingly, getFireTimeAfter is present on both CronTrigger and SimpleTrigger, but isn't in the Trigger interface. That's the least of Quartz's API sins, mind you.